Combustion reaction of fuels is a/an ______________ reaction?
Correct answer: B. Exothermic
- A. Auto catalytic
- B. Exothermic
- C. Endothermic
- D. None of these
Explanation
Combustion releases the chemical energy of the fuel as heat, so its enthalpy change is negative and the reaction is exothermic. Endothermic reactions instead absorb heat from their surroundings.
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